CN114993572A - Air tightness detection device, system and detection method - Google Patents
Air tightness detection device, system and detection method Download PDFInfo
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- CN114993572A CN114993572A CN202210697380.3A CN202210697380A CN114993572A CN 114993572 A CN114993572 A CN 114993572A CN 202210697380 A CN202210697380 A CN 202210697380A CN 114993572 A CN114993572 A CN 114993572A
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- 238000012360 testing method Methods 0.000 claims abstract description 47
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- 238000004891 communication Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 137
- 238000000034 method Methods 0.000 description 16
- 230000017525 heat dissipation Effects 0.000 description 7
- 239000003381 stabilizer Substances 0.000 description 7
- 238000010622 cold drawing Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The application discloses gas tightness detection device, system and detection method relates to the technical field of gas tightness detection, and includes: the air supply pipeline is used for supplying air to a product to be detected; at least one filter in communication with the air supply line, the filter for filtering air flow in the air supply line; the air tightness detector is connected to the outlet end of the filter and communicated with the air supply pipeline so as to detect the gas leakage condition in the product to be detected; the branch pipelines are communicated with the outlet end of the air tightness detector, and each branch pipeline is connected with a product to be detected to realize simultaneous or independent air supply of a plurality of products to be detected. This application can the multichannel detect, simple structure integrates the height moreover, the high, good gas tightness pressurize test equipment of reliability of the degree of accuracy of instrument.
Description
Technical Field
The application relates to the technical field of air tightness detection, in particular to an air tightness detection device, system and method.
Background
The computer components are largely made of integrated circuits, and the high temperature is a big enemy of the integrated circuits, so that the high temperature can not only cause unstable operation and shortened service life, but also can even cause that some components are burnt out, and the high-temperature heat does not come from the inside of the computer or the inside of the integrated circuits, so that the heat dissipation problem of the server becomes an important problem. At present, because the traditional fan heat dissipation mode has the defects of low efficiency and high noise and is difficult to meet the heat dissipation requirement, a liquid cooling heat dissipation technology is introduced, and heat dissipation is performed on a server more efficiently and reliably through the liquid cooling heat dissipation technology. The cold plate type heat dissipation technology may have a risk of leakage of cooling liquid (generally water), and once the conductivity of the cooling liquid is leaked, slight leakage occurs, which may cause a signal error of a server to be down, and severe leakage even causes a short circuit of the server, thereby burning the server. Therefore, the tightness of the server cold plate type radiator system needs to be fully ensured, and the pressure maintaining test equipment is a good method for testing the tightness of the cold plate type radiator.
Among the prior art, adopt the bubble method to server cold drawing gas tightness pressurize test, place the cold drawing product in the complete submergence of aquatic, be connected cold drawing product water inlet and air supply, adjust the atmospheric pressure of air supply and close the air supply behind the numerical value of regulation, observe whether there is the gassing on the cold drawing product, the problem that exists in the testing process includes: the test site needs personnel to monitor always, and gaseous whole erroneous judgement appears in the back of revealing easily otherwise, and the test result can not the datamation, is difficult to carry out accurate judgement, probably leads to some to reveal a little the problem can not accurately detect out, and the time of pressurize test needs artificial subjective control, and the degree of accuracy is poor.
Disclosure of Invention
In order to solve at least one problem mentioned in the background art, the application provides an air tightness detection device, system and detection method, which can perform multi-channel detection, have a simple structure, high integration, high accuracy of an instrument and good reliability, have an alarm mechanism, assist operation and maintenance personnel in accurately positioning system abnormity, have a comprehensive real-time monitoring function of operating parameters, and have a communication interface capable of customizing an upper computer for communication according to client requirements.
The embodiment of the application provides the following specific technical scheme:
in a first aspect, an air tightness detecting device is provided for detecting the air tightness of a product to be detected, the device includes:
the air supply pipeline is used for supplying air to a product to be detected;
at least one filter in communication with the air supply line, the filter for filtering air flow in the air supply line;
the air tightness detector is connected to the outlet end of the filter to detect the gas leakage condition of the product to be detected;
the air tightness detector comprises a plurality of branch pipelines, wherein the branch pipelines are communicated with the outlet end of the air tightness detector, and each branch pipeline is connected with a product to be detected so as to realize simultaneous or independent air supply of a plurality of products to be detected.
Further, the method also comprises the following steps:
at least two pressure sensors, a first of said pressure sensors being mounted at an inlet end of said filter for sensing the pressure of the airflow entering said filter and a second of said pressure sensors being mounted at an outlet end of said filter for sensing the pressure of the airflow exiting said filter;
the temperature and humidity sensor is arranged at the inlet end of the filter and used for detecting the temperature and humidity of the airflow entering the filter, and the temperature and humidity sensor is arranged at the outlet end of the filter and used for detecting the temperature and humidity of the airflow flowing out of the filter.
Further, the method also comprises the following steps:
the gas inlet of the gas exhaust pipeline is communicated with the gas outlet of the product to be detected and is used for exhausting gas in the product to be detected after detection is finished;
and one end of the circulating pipeline is communicated with the outlet end of the filter, and the other end of the circulating pipeline is communicated with the inlet end of the filter.
Further, the method also comprises the following steps:
the electromagnetic valves are arranged at the inlet end and the outlet end of the branch pipeline;
and the control end controls the electromagnetic valve to be opened or closed after receiving the operation instruction so as to supply gas into the product to be tested and discharge the gas in the product to be tested after the test is finished.
Further, the access connection of air supply line have the chuck and with the chuck staple bolt of chuck cooperation installation, the chuck with the chuck sealing washer has been extruded between the chuck staple bolt.
Further, the airtightness detector includes:
and at least one airflow sensor is correspondingly connected to one branch pipeline and used for detecting the airflow condition in the branch pipeline.
Further, the device also comprises a support shell, wherein the support shell comprises an upper support platform and a lower support platform, and the upper support platform is provided with an air tightness detector and a control end; and an air supply pipeline, an electromagnetic valve, a pressure sensor, a temperature and humidity sensor and a filter are arranged on the lower supporting platform.
Furthermore, the bottom of the supporting shell is provided with a supporting leg and a rotating wheel, and the height of the supporting leg can be adjusted.
In a second aspect, a gas tightness detection system is provided, which includes the gas tightness detection device as described above and a judgment module;
the judging module is used for confirming that the airflow entering the air supply pipeline meets the preset conditions according to the numerical values of the two pressure sensors and the two temperature and humidity sensors.
In a third aspect, there is provided a method for detecting the airtightness detection apparatus, the method including the steps of:
communicating the inlet end of a product to be tested with a branch pipeline, and communicating the outlet end of the product to be tested with an exhaust pipeline; the control end receives an operation instruction, controls the opening of the inlet end electromagnetic valve and the closing of the outlet end electromagnetic valve, supplies gas meeting preset conditions in the gas supply pipeline to the product to be tested, and starts to test when the gas in the product to be tested reaches preset parameters of the gas tightness detector; after the test is finished, the air tightness detector displays the detection result, and controls the electromagnetic valve at the outlet end to be opened to discharge the gas in the product to be tested.
The embodiment of the application has the following beneficial effects:
1. the air supply pipeline for supplying air to the product to be tested is connected with the air tightness detector for detecting the air leakage condition of the product to be tested, and the outlet end of the air tightness detector is respectively communicated with a plurality of branch pipelines which separate the air in the air supply pipeline so as to supply air to the product to be tested on each branch pipeline; can realize filtering the gas that gets into in the product that awaits measuring through the filter through above setting, make its humiture and other reach preset the condition, then go on the product that awaits measuring through the air supply line again, impurity and moisture etc. in the reducible gas improve the precision of test to the influence of test result, can realize simultaneously through setting up of a plurality of branch pipelines that this device carries out the test of the same or different conditions to a plurality of products that await measuring simultaneously, improve the efficiency that the gas tightness detected.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 shows a schematic view of a principle of a gas tightness detection device according to the present application;
FIG. 2 shows a schematic view of the connection end of an air supply line according to the present application;
fig. 3 shows a schematic structural view of a support housing of the air-tightness detection device according to the present application;
fig. 4 shows a schematic view of a method of detecting hermeticity according to the present application.
In the figure, 1, a gas supply pipeline; 2. a branch line; 3. an air tightness detector; 4. an electromagnetic valve; 5. a filter; 6. a pressure sensor; 7. a temperature and humidity sensor; 8. a circulation line; 9. a chuck; 10. a chuck hoop; 11. a chuck seal ring; 12. a support housing; 13. a support leg; 14. and rotating the wheel.
Detailed Description
In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the embodiments of the present application, the reference to "up" and "down" is based on the orientation of the support housing shown in fig. 3.
Example one
The utility model provides an air tightness detection device, as shown in fig. 1 for detect the gas tightness of the product that awaits measuring, the product that awaits measuring in this embodiment of specificities is the server cold drawing, is provided with air inlet and gas outlet on the server cold drawing, the device includes:
the gas supply system comprises a gas supply pipeline 1, wherein a gas inlet end of the gas supply pipeline 1 is communicated with an external gas supply system and is used for filling gas into a product to be detected; the medium for detecting air tightness can be air or nitrogen. The outlet end of the air supply pipeline 1 is communicated with two filters 5, the two filters 5 are sequentially communicated with the air supply pipeline 1 end to end, and the specific filters 5 are used for filtering impurities, moisture and the like in air in the air supply pipeline 1.
And the air tightness detector 3 is communicated with an external power supply system through an electric wire, and the air tightness detector 3 is communicated with the outlet end of the filter 5 so as to realize that the filtered air passes through the air supply pipeline 1 and enters the air tightness detector 3 and ensure that the air tightness detector 3 detects the air leakage condition in the product to be detected. The airtightness detector has the functions of automatically stabilizing and regulating the pressure, and the accuracy of a test result is further improved.
The outlet end of the air tightness detector 3 is communicated with the branch pipelines 2, the number of the branch pipelines 2 is four, the outlet end of each branch pipeline 2 is communicated with the air inlet end of a product to be detected, the product to be detected is filled with air, and simultaneous or independent air supply of at least four products to be detected is realized. Specifically, an electromagnetic valve 4 is installed at one end of each branch pipeline 2 close to the gas supply pipeline 1, and after the gas is filled into the product to be tested, the gas tightness of the product to be tested can be tested by closing the electromagnetic valve 4. The air tightness detector 3 is further provided with four air flow sensors, the four air flow sensors are respectively connected with the four branch pipelines 2 in a one-to-one correspondence manner, and are used for detecting the air flow condition of the air in each branch pipeline 2 and displaying the detection result through a display device in the air tightness detector 3. Be provided with a plurality of airflow sensor in gas tightness detector 3, every airflow sensor corresponds and installs on a lateral 2 to the realization is carried out the gas feed simultaneously or alone through airflow sensor to the product that awaits measuring of connecting on every lateral 2, thereby improves the efficiency of the test to the gas tightness of the product that awaits measuring.
In a preferred embodiment, four control consoles are provided in the air-tightness detector 3, one for each branch line 2, for setting parameters of the air flow in the corresponding branch line 2 and setting test conditions, specifically including: "CH 1 channel: inflation time 30/S, dwell time 30/S, test time 30/S, exhaust time 20/S, pressure setting 10/Kpa, upper pressure limit 11/Kpa, lower pressure limit 9/Kpa, upper leak limit 8/Kpa, and lower leak limit 6/Kpa "; "CH 2 channel: inflation time 20/S, dwell time 20/S, test time 20/S, exhaust time 20/S, pressure setting 10/Kpa, upper pressure limit 11/Kpa, lower pressure limit 9/Kpa, upper leak limit 8/Kpa, and lower leak limit 6/Kpa "; "CH 3 channel: inflation time 20/S, dwell time 20/S, test time 20/S, exhaust time 10/S, pressure setting 15/Kpa, upper pressure limit 16/Kpa, lower pressure limit 13/Kpa, upper leak limit 13/Kpa, and lower leak limit 10/Kpa "" CH4 channels: inflation time 10/S, dwell time 20/S, test time 20/S, exhaust time 10/S, pressure setting 15/Kpa, upper pressure limit 16/Kpa, lower pressure limit 13/Kpa, upper leak limit 13/Kpa, and lower leak limit 10/Kpa ". Except for the above, the pressure holding pressure, the pressure holding time, the leakage parameters and the like can be set according to actual needs, and according to the above settings, the tests of a plurality of products to be tested under the same conditions and the tests of the same products under different conditions can be realized according to different setting parameters and test conditions.
Still include the exhaust pipe, exhaust pipe and branch pipeline 2 one-to-one set up, the air inlet of exhaust pipe and the gas outlet intercommunication of the product that awaits measuring for after the detection is accomplished, the gas in the product that awaits measuring of discharge. And, also install solenoid valve 4 near the exit end of blast pipe, be full of gas when the product that awaits measuring and begin to test and close solenoid valve 4 and prevent solenoid valve 4's the revealing, influence the accuracy of gas tightness test.
Since the gas entering the gas supply line 1 may contain moisture and some impurities, a filter 5 is provided to filter the gas entering the product to be measured, and in order to ensure that the moisture and impurities in the filtered gas are removed, a set of pressure sensor 6 and temperature and humidity sensor 7 are provided before and after the gas passes through the filter 5, respectively. A first pressure sensor 6 is installed at an inlet end of the filter 5 for detecting a pressure of the air flow entering the filter 5, a second pressure sensor 6 is installed at an outlet end of the filter 5 for detecting a pressure of the air flow exiting the filter 5, and the two pressure sensors 6 transmit a result of the detected air flow to a control end by an electric signal; the first temperature and humidity sensor 7 is installed at the inlet end of the filter 5 and used for detecting the temperature and humidity of the airflow entering the filter 5, the second temperature and humidity sensor 7 is installed at the outlet end of the filter 5 and used for detecting the temperature and humidity of the airflow flowing out of the filter 5, and the two temperature and humidity sensors 7 transmit the detected results of the airflow to the control end through electric signals. One side of the air supply pipeline 1 is communicated with a circulating pipeline 8, one end of the circulating pipeline 8 is connected to the outlet end of the second filter 5, the other end of the circulating pipeline 8 is connected to the inlet end of the second filter 5, and if the gas passing through the second filter 5 still does not meet the preset condition, the gas is introduced into the second filter 5 again through the circulating pipeline 8 to be filtered again.
The gas tightness detector is characterized by further comprising a control end, wherein the control end is electrically connected with the electromagnetic valve 4, the gas tightness detector 3, the pressure sensor 6 and the temperature and humidity sensor 7 and used for controlling the electromagnetic valve 4 to be opened or closed according to a received operation instruction, realizing gas supply to the product to be detected and discharging gas in the product to be detected after the test is finished.
Specifically, the control end can be according to the testing result of two pressure sensor 6 and two humiture sensors 7 received, realize filtering and detecting and turning into signal transmission to the control end getting into the gas in the air supply line 1, so that the parameter of the gas after filtering through filter 5 satisfies to the pressure and the humiture requirement of gas in the preset condition, just can get into the product that awaits measuring and be used for its gas tightness to detect, reduce the error of the result that leads to because there is impurity or moisture in the gas, improve the precision to the state detection of the gas that carries out the gas tightness and detect, make the precision that the gas tightness detected can reach 0.1 kpa.
As shown in fig. 2, in order to ensure the leakproofness of being connected between air supply line 1 and the entrance point of the product to be measured, ring shape chuck 9 is installed at the tip of air supply line 1, 9 staple bolts of chuck with chuck 9 cooperation installation, the circular through-hole that is used for holding chuck 9 is offered at the middle part of 9 staple bolts of chuck, be equipped with 9 sealing rings of chuck in the outside cover of chuck 9, when 9 cards of chuck go into 9 staple bolts of chuck, 9 sealing rings of chuck extrude between 9 staple bolts of chuck and chuck 9, with the sealing property of being connected between improvement chuck 9 and 9 staple bolts of chuck, it is concrete, the material of 9 sealing rings of chuck is the rubber material.
In a preferred embodiment, as shown in fig. 3, the apparatus further includes a supporting housing 12, the supporting housing 12 is rectangular, the supporting housing 12 specifically includes an upper supporting platform and a lower supporting platform, the upper supporting platform is provided with the air-tightness detector 3 and a control end connected to the air-tightness detector 3 through an electric wire, the specific control end is a computer, and the lower supporting platform is provided with the air supply pipeline 1, the electromagnetic valve 4, the pressure sensor 6, the temperature and humidity sensor 7 and the filter 5. Specifically, the air supply pipeline 1 is communicated with the lower part of the air tightness detector 3, and extends out of the upper support table to be connected with the filter 5 on the lower support table. Install stabilizer blade 13 and rotation wheel 14 in the bottom of supporting shell 12, stabilizer blade 13 and rotation wheel 14 are provided with four groups, correspond respectively and install four angles at supporting shell 12, it is the universal wheel to rotate wheel 14, it can make staff's propelling movement supporting shell 12 move to other positions to rotate wheel 14 conflict ground, stabilizer blade 13 for can adjust from top to bottom stabilizer blade 13, after the staff removes detection device to the position of test, it conflicts subaerial to adjust stabilizer blade 13, it supports detection device in the position that corresponds to form stabilizer blade 13, when needs remove detection device, the staff adjusts stabilizer blade 13 and stretches out and draws back to the bottom that is close to supporting shell 12, make and rotate wheel 14 and conflict ground, in order to realize detection device's removal.
In a preferred embodiment, the upper portion of the supporting housing 12 is further provided with a power interface for connecting with an external power supply system to supply power to the detecting device, and an emergency stop switch button for immediately stopping detection when a fault occurs in detection. Still install the pilot lamp on the top of supporting shell 12, the pilot lamp passes through the electric wire and is connected with outside power supply system, simultaneously with control end electric connection, if carrying out the testing process to the product that awaits measuring, the leakage rate that the product that awaits measuring appears is higher, when having surpassed predetermined normal range, then reminds the staff through the pilot lamp.
The specific implementation process comprises the following steps: firstly, communicating an inlet end of a product to be tested with a gas outlet of a branch pipeline 2, communicating the gas outlet of the product to be tested with a gas inlet end of a gas exhaust pipe, and setting a preset condition of gas entering a gas supply pipeline 1 in a control end; then, an external gas supply system is opened, gas enters the gas supply pipeline 1, when the gas passes through the first pressure sensor 6 and the first temperature and humidity sensor 7, the pressure sensor 6 and the temperature and humidity sensor 7 transmit initial data of the detected gas to a control end, and whether the current data meet preset conditions or not is judged; if the current data meets the preset conditions, the control end controls the electromagnetic valve 4 at the inlet end of the branch pipeline 2 to be opened to start inflation, and if the current data does not meet the preset conditions, the current data of the gas is detected through the second pressure sensor 6 and the second temperature and humidity sensor 7 after the gas is filtered by the filter 5; if the pressure difference meets the requirement, the control end controls the electromagnetic valve 4 at the inlet end of the branch pipeline 2 to be opened, the electromagnetic valve 4 at the outlet end of the branch pipeline is closed, and gas starts to be supplied to the product to be measured; if the pressure in the product to be tested is not met, the gas is input into the filter 5 again through the circulating pipeline 8 to be filtered until the state of the gas meets the preset condition, at the moment, the gas tightness detector 3 starts to detect the gas pressure in the product to be tested, when the gas pressure reaches a set value, gas supply is stopped, pressure maintaining test is carried out on the product to be tested according to the set parameters in the gas tightness detector 3, and after the test is finished, a test result is displayed.
Example two
Corresponding to the above embodiments, the present application provides an air tightness detecting system, which includes the air tightness detecting device and the judging module as described above;
the judging module is used for confirming that the airflow entering the air supply pipeline meets the preset conditions according to the numerical values of the two pressure sensors and the two temperature and humidity sensors.
Specifically, two pressure sensors and two temperature and humidity sensors are respectively arranged at an inlet end and an outlet end of a filter to test the initial pressure and the initial temperature and humidity of gas entering the filter and the current pressure and the current temperature and humidity of gas outputting the filter, and transmit a test result to a control end, the control end judges whether the initial state of the gas meets a preset condition according to an initial value, if the preset condition is met, the gas does not need to be filtered, and the gas is directly filled into a product to be tested; if the initial state is not satisfied, adjusting the filter to start filtering the gas, then detecting the gas value of the output filter, if the gas state after filtering satisfies the preset condition, filling the gas into the product to be tested for testing, and if the gas state does not satisfy the preset condition, introducing the gas which does not satisfy the preset condition into the filter through the circulating pipeline for filtering again until the gas satisfies the preset condition.
For example, preset conditions are set: state of gas: the pressure value is 1-1.1 kpa, the temperature value is 24-25 ℃, and the humidity value is 45-48%. The gas was first tested at an initial pressure of "1.5 kpa", an initial temperature of "25 c", an initial humidity of "65%", it is judged that the gas parameter in the initial state does not satisfy the preset condition, and thus the filtering of the gas through the filter is started, then the parameters of the filtered gas are detected, the current pressure is 1.0kpa, the current temperature is 24 ℃, the current humidity is 55%, so as to judge that the humidity of the filtered gas is too high and does not meet the preset condition, at the moment, the gas is transmitted into the filter through the circulating pipeline for secondary filtering, and then, detecting the filtered gas again, wherein the obtained detection results comprise that the pressure is 1.0kpa, the temperature is 24 ℃, and the humidity is 45%, and at the moment, the state of the gas meets the preset condition, opening an electromagnetic valve to enable the gas to enter a product to be detected through a branch pipeline, and starting to test.
In a preferred embodiment, the system comprises a gas supply line communicating the inlet end of the product to be tested with the branch line and the outlet end of the product to be tested with the gas discharge line.
In a preferred embodiment, the air tightness detector comprises a plurality of air flow sensors, at least one of the air flow sensors is correspondingly connected to one of the branch pipelines, and the air flow sensors are used for detecting the air flow condition in the branch pipelines.
In a preferred embodiment, the system further comprises a circulation pipeline, a solenoid valve is installed on the circulation pipeline, one end of the circulation pipeline is communicated with the outlet end of the filter, and the other end of the circulation pipeline is communicated with the inlet end of the filter, so that when the gas state does not meet the preset condition, the gas is re-input into the filter through the circulation pipeline for filtering again until the gas state meets the preset condition.
The specific implementation process comprises the following steps: firstly, communicating an inlet end of a product to be tested with a gas outlet of a branch pipeline, communicating the gas outlet of the product to be tested with a gas inlet end of a gas exhaust pipe, and setting a preset condition of gas entering a gas supply pipeline in a control end; then, an external gas supply system is opened, gas enters a gas supply pipeline, when the gas passes through a first pressure sensor and a first temperature and humidity sensor, the pressure sensor and the temperature and humidity sensor transmit initial data of the detected gas to a control end, and whether current data meet preset conditions or not is judged; if the current data meets the preset conditions, the control end controls an electromagnetic valve at the inlet end of the branch pipeline to be opened to start inflation, and if the current data does not meet the preset conditions, the current data of the gas is detected through a second pressure sensor and a second temperature and humidity sensor after the gas is filtered by the filter; if the pressure difference meets the requirement, the control end controls the electromagnetic valve at the inlet end of the branch pipeline to be opened, the electromagnetic valve at the outlet end of the branch pipeline to be closed, and gas begins to be supplied to the product to be detected; if the pressure in the product to be tested is not met, the gas is input into the filter again through the circulating pipeline to be filtered until the state of the gas meets the preset condition, the gas tightness detector starts to detect the gas pressure in the product to be tested at the moment, the gas supply is stopped when the gas pressure reaches a set value, the product to be tested is subjected to pressure maintaining test according to the set parameters in the gas tightness detector, and after the test is finished, the test result is displayed.
EXAMPLE III
In correspondence with the above embodiments, the present embodiment provides a method for detecting airtightness, as shown in fig. 4, the method includes the steps of:
step S1: communicating an inlet end of a product to be measured with a branch pipeline, and communicating an outlet end of the product to be measured with an exhaust pipeline;
step S2: the control end receives an operation instruction, controls the opening of the inlet end electromagnetic valve and the closing of the outlet end electromagnetic valve, and supplies gas meeting preset conditions in the gas supply pipeline to a product to be detected;
step S3: when the gas in the product to be tested reaches the preset parameters of the gas tightness detector, starting the test;
step S4: after the test is finished, the air tightness detector displays the detection result, and controls the electromagnetic valve at the outlet end to be opened to discharge the gas in the product to be tested.
In a preferred embodiment, the step S2 further includes confirming that the airflow entering the air supply pipeline satisfies the preset condition according to values of two pressure sensors and two temperature and humidity sensors, and specifically includes at least two pressure sensors, a first pressure sensor is installed at the inlet end of the filter and used for detecting the pressure of the airflow entering the filter, and a second pressure sensor is installed at the outlet end of the filter and used for detecting the pressure of the airflow outputting the filter; the temperature and humidity sensor is arranged at the inlet end of the filter and used for detecting the temperature and humidity of the airflow entering the filter, and the temperature and humidity sensor is arranged at the outlet end of the filter and used for detecting the temperature and humidity of the airflow flowing out of the filter.
In a preferred embodiment, the step S3 specifically includes that four air flow sensors are further disposed in the air-tightness detector, and the four air flow sensors are respectively connected to the four branch pipelines in a one-to-one correspondence manner, and are used for detecting the air flow condition of the gas in each branch pipeline, and displaying the detection result through a display device in the air-tightness detector. Be provided with a plurality of air current sensor in the gas tightness detector, every air current sensor corresponds installs on a bleeder circuit to the realization is carried out the simultaneous or independent air feed through air current sensor to the product that awaits measuring that every bleeder circuit is connected, thereby improves the efficiency of software testing to the gas tightness of the product that awaits measuring.
In a preferred embodiment, four control consoles are provided in the air-tightness detector, one for each branch line, for setting parameters of the air flow in the corresponding branch line and setting test conditions, including, for example: "CH 1 channel, CH2 channel, CH3 channel, and CH4 channel", parameters of which each channel can be set correspondingly include: inflation time/S, dwell time/S, sensing time/S, exhaust time/S, pressure setting/Kpa, upper pressure limit/Kpa, lower pressure limit/Kpa, upper leak limit/Kpa, and lower leak limit/Kpa.
In a preferred embodiment, step S2 further includes a circulation line having a solenoid valve installed thereon, one end of the circulation line being in communication with the outlet end of the filter and the other end being in communication with the inlet end of the filter, for allowing the gas to be re-introduced into the filter through the circulation line for filtering again when the gas state does not satisfy the predetermined condition until the gas state satisfies the predetermined condition.
In a preferred embodiment, still include the pilot lamp, the pilot lamp passes through the electric wire and is connected with external power supply system, simultaneously with control end electric connection, if in the product that awaits measuring carrying out the testing process, the leakage rate that appears the product that awaits measuring is higher, when having surpassed predetermined normal sphere, reminds the staff through the pilot lamp.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The utility model provides an air tightness detection device for detect the gas tightness of the product that awaits measuring, its characterized in that, the device includes:
the air supply pipeline is used for supplying air to a product to be detected;
at least one filter in communication with the air supply line, the filter for filtering air flow in the air supply line;
the air tightness detector is connected to the outlet end of the filter to detect the gas leakage condition of the product to be detected;
the air tightness detector comprises a plurality of branch pipelines, wherein the branch pipelines are communicated with the outlet end of the air tightness detector, and each branch pipeline is connected with a product to be detected so as to realize simultaneous or independent air supply of a plurality of products to be detected.
2. The airtightness detection apparatus according to claim 1, further comprising:
at least two pressure sensors, a first of said pressure sensors being mounted at an inlet end of said filter for sensing the pressure of the airflow entering said filter and a second of said pressure sensors being mounted at an outlet end of said filter for sensing the pressure of the airflow exiting said filter;
the temperature and humidity sensor is arranged at the inlet end of the filter and used for detecting the temperature and humidity of the airflow entering the filter, and the temperature and humidity sensor is arranged at the outlet end of the filter and used for detecting the temperature and humidity of the airflow flowing out of the filter.
3. The airtightness detection apparatus according to claim 2, further comprising:
the gas inlet of the gas exhaust pipeline is communicated with the gas outlet of the product to be detected and is used for exhausting gas in the product to be detected after detection is finished;
and one end of the circulating pipeline is communicated with the outlet end of the filter, and the other end of the circulating pipeline is communicated with the inlet end of the filter.
4. The airtightness detection apparatus according to claim 3, further comprising:
the electromagnetic valves are arranged at the inlet end and the outlet end of the branch pipeline;
and the control end receives the operation instruction and then controls the electromagnetic valve to be opened or closed so as to realize gas supply into the product to be tested and discharge the gas in the product to be tested after the test is finished.
5. The airtightness detection apparatus according to claim 4, wherein a chuck and a chuck hoop fitted to the chuck are connected to the inlet of the air supply line, and a chuck sealing ring is compressed between the chuck and the chuck hoop.
6. The airtightness detection apparatus according to claim 5, wherein the airtightness detector comprises:
and at least one airflow sensor is correspondingly connected to one branch pipeline and used for detecting the airflow condition in the branch pipeline.
7. The airtightness detection apparatus according to claim 6, further comprising a support housing, wherein the support housing comprises an upper support platform and a lower support platform, and the upper support platform is provided with an airtightness detector and a control end; and an air supply pipeline, an electromagnetic valve, a pressure sensor, a temperature and humidity sensor and a filter are arranged on the lower supporting platform.
8. The airtightness detection apparatus according to claim 7, wherein a support leg and a rotating wheel are mounted on a bottom portion of the support housing, and a height of the support leg is adjustable.
9. An air tightness detection system, characterized in that the system comprises the air tightness detection device of any one of claims 1 to 8 and a judgment module;
the judging module is used for confirming that the airflow entering the air supply pipeline meets the preset conditions according to the numerical values of the two pressure sensors and the two temperature and humidity sensors.
10. A detection method based on the airtightness detection device according to any one of claims 1 to 8, comprising the steps of:
communicating the inlet end of a product to be tested with a branch pipeline, and communicating the outlet end of the product to be tested with an exhaust pipeline;
the control end receives an operation instruction, controls the opening of the inlet end electromagnetic valve and the closing of the outlet end electromagnetic valve, and supplies gas meeting preset conditions in the gas supply pipeline to a product to be detected;
when the gas in the product to be tested reaches the preset parameters of the gas tightness detector, starting the test;
after the test is finished, the air tightness detector displays the detection result, and controls the electromagnetic valve at the outlet end to be opened to discharge the gas in the product to be tested.
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| CN202210697380.3A CN114993572A (en) | 2022-06-20 | 2022-06-20 | Air tightness detection device, system and detection method |
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| CN202210697380.3A CN114993572A (en) | 2022-06-20 | 2022-06-20 | Air tightness detection device, system and detection method |
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Cited By (1)
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